* Informal: "It was a real hassle trying to find parking downtown."
* Formal: "The process of obtaining a visa was a considerable hassle."
* Emphasizing effort: "I'm not going to deal with the hassle of cooking tonight, let's order takeout."
* Expressing frustration: "It's such a hassle having to constantly clean up after my dog."
You can also use "hassle" as a verb:
* "Don't hassle me, I'm trying to work."
* "The kids kept hassling each other at the dinner table."
Remember, "hassle" is generally considered informal, so using it in formal writing might not be appropriate.